How does an ip prefix
I'm trying to understand it since a while now but I am unable to derive the logic.
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For a netmasked IP address xxx.xxx.xxx.xxx/N, convert each xxx octet in the address to binary. The masked address is the leftmost N bits with all other bits replaced with zeroes.
So 10.0.0.2/2 becomes 00001010 00000000 00000000 00000010 which is then masked to 00000000 00000000 00000000 00000000, because 00 are the leftmost 2 bits.
18.104.22.168/4 becomes 01011010 00000000 00000000 00000000 which is then masked to 01010000 00000000 00000000 00000000, because 0101 are the leftmost 4 bits.